JP7623660B2 - Concrete member connection device - Google Patents

Description

The present invention relates to a connecting device for concrete members.

Conventionally, a concrete member connecting device that connects concrete members to each other is known that uses a female connecting member 100 and a male connecting member 101, as shown in FIG. 16.

This female connecting member 100 has a casing 103 that has a tapered hole 102 formed in the axial direction inside and multiple sliding guide ridges that are divided circumferentially along the inner surface of the tapered hole 102 along the axial direction, a female locking member (wedge nut) 106 whose outer surface is formed into a tapered surface 104 that fits the tapered hole 102 and whose inner surface has a female thread 105, and a compression spring 107 that presses the wedge nut 106 towards the tip.

The male connecting member 101 has a connecting body 109 disposed inside a cylindrical adjustment member 108 formed of a deformable material, for example, an elastic material such as polystyrene foam or rubber, resin, or cardboard, and a male locking member 110 is disposed at the tip of the connecting body 109. A male thread 111 that meshes with the female thread 105 of the female connecting member 100 is engraved on the outer periphery of the male locking member 110.

An anchor bar 112 is screwed and fixed to the rear of the connector 109, and a retaining portion is provided at the rear end of the anchor bar 112. A space-retaining pipe 113 made of an elastic material such as rubber or metal is provided on the outer periphery of the anchor bar 112. The front end of the space-retaining pipe 113 engages with the rear side of the adjustment member 108, and the rear end engages with a seat member (not shown) made of an elastic material such as rubber provided on the retaining portion (not shown) of the anchor bar 112. A gap 114 is provided between the anchor bar 112 and the space-retaining pipe 113.

When connecting this connecting device, the male locking member 110 is inserted into the female connecting member 100 without rotating the female connecting member 100, and the female threads 105 of the split wedge nut 106 engage with the male threads 111 of the male locking member 110, pushing the wedge nut 106 toward the larger diameter side against the compression spring 107, causing the inner diameter of the female threaded hole formed by the multiple wedge nuts 106 to expand, allowing the male locking member 110 to be inserted to a predetermined position in the female connecting member 100. Once insertion is complete, the female threads 105 of the wedge nut 106 engage with the male threads 111 of the male locking member 110 due to the biasing force of the compression spring 107, thereby connecting the female connecting member 100 and the male connecting member 101.

There is a demand for using the connector configured as described above to connect concrete shield segments used in tunnels, for example. In this case, the female connector member 100 of the connector is provided on one shield segment, and the male connector member 101 is provided on the other shield segment.

A hollow section 115 with both axial ends open is formed in the connecting body 109 of the male connecting member 101, and a female thread is engraved along the entire inner wall of the hollow section. The male locking member 110 is attached to the connecting body 109 by screwing the male thread 116 engraved on the inner side of the male locking member 110 into the female thread 116.

Therefore, in order to ensure the strength against the shear load applied to the male locking member 110 when the two shield segments are connected, the male locking member 110 needs to have a certain diameter or more, which creates a problem in terms of manufacturing costs.

The present invention aims to provide a connecting device for concrete members that reduces the manufacturing costs of male locking members while ensuring strength against shear loads.

In order to solve the above problem, the present invention provides a connector having a female connector and a male connector,
A storage chamber having an open tip is provided in the female connecting member, and a female locking member having a locking portion formed of a continuous locking ridge on an inner surface side is provided in the storage chamber,
a male locking member having a locking portion formed of a continuous locking ridge at a tip of the male connecting member;
A locking hole is formed on the inner side of the female locking member,
By inserting the male locking member into the locking hole, the locking hole expands in diameter and then contracts in diameter, so that the locking portion of the female locking member and the locking portion of the male locking member engage with each other,
The female connecting member is fixed to one concrete member, and the male connecting member is fixed to the other concrete member,
The male connecting member has a connecting body having a hollow portion with an opening at a tip, and a female screw is formed on the inner wall of the hollow portion of the connecting body,
A base is provided on the inner side of the locking portion, and a male screw is formed on the inner side of the base to screw into the female screw of the connector,
The outer diameter of the base is larger than the outer diameters of the locking portion and the male screw,
The outer diameter of the locking portion side end of the base is made thinner toward the locking portion side, and the outer diameter of the male thread side end of the base is made thinner toward the locking portion side,
A gap is formed between the outer surface of the base and a member positioned outside the base,
The rear side of the base is located rearward of the one concrete member side surface of the other concrete member,
The present invention is characterized in that a first adjustment member made of a deformable material is provided on the outer periphery of the connector.

The invention described in claim 2 is the invention described in claim 1, wherein a tapered hole having a tapered surface with a diameter decreasing toward the front is formed in the storage chamber, a wedge-shaped female locking member divided in the circumferential direction is disposed in the tapered hole so as to be axially slidable, and a locking portion consisting of a plurality of locking ridges is engraved on the inner surface of the female locking member, and the female locking member is biased forward by a biasing means,
The male locking member is inserted into a locking hole formed by the female locking member, thereby expanding the diameter of the locking hole, and then the locking hole is reduced in diameter by a biasing means so that the locking portion of the female locking member and the locking portion of the male locking member engage with each other.

The invention described in claim 3 is the invention described in claim 1 or 2, wherein the tip end of the connector is positioned on the rear side of the one concrete member side surface of the other concrete member,
The base portion is provided on the tip side of the tip end of the connector,
The present invention is characterized in that a space is formed around the back side of the base.

The invention described in claim 4 is the invention described in claims 1 to 3, characterized in that a connector movement suppression member is provided on the radial outside of the axis of the male locking member of the first adjustment member, the suppressing movement of the connector in the radial direction around the axis of the male locking member of the connector.

The invention described in claim 5 is the invention described in claim 4, characterized in that a second adjustment member made of a deformable material is provided on the radial outside of the axis of the male locking member of the connector movement suppression member.

The invention of claim 6 is the invention of claim 3, further comprising a base movement suppressing member formed of metal on the radial outside of the axis of the male locking member at the back side of the base, the base movement suppressing member suppressing radial movement of the male locking member at the base, the base movement suppressing member being provided on the radial outside of the axis of the male locking member at the back side of the base,
The space is formed between the base movement suppressing member and the base,
The base movement suppression member is characterized in that it is embedded in the other concrete member.

The invention described in claim 7 is the invention described in claim 6, characterized in that a second adjustment member made of a deformable material is provided on the radial outside of the axis of the male locking member of the base movement suppression member.

The invention of claim 8 is the invention of claim 6 or 7, further comprising a first adjustment member formed of a deformable member on the outer periphery of the connecting body, and a connecting body movement suppressing member formed of metal on the outer side in the radial direction around the axis of the male locking member of the first adjustment member, which suppresses movement of the connecting body in the radial direction around the axis of the male locking member,
The connector movement suppressing member and the base movement suppressing member are formed integrally.

The present invention increases the strength of the male locking member against shear loads by forming the outer diameter of the base to be larger than the outer diameter of the locking portion and the male screw, and positioning the rear side of the base further back than the side surface of one concrete member in the other concrete member. This allows the male locking member to be made thinner, reducing the manufacturing costs of the male connecting member.

FIG. 2 is a partial cross-sectional view of one half of the concrete member connecting device in the first embodiment of the present invention, showing the connected state of the female connecting member and the male connecting member. FIG. 4 is a partial cross-sectional view of a half surface of a female connecting member used in the first embodiment of the present invention. FIG. 2 is a partial cross-sectional view of one half of a male connecting member used in the first embodiment of the present invention. 13 is a partial cross-sectional view for explaining a method of connecting a female connecting member and a male connecting member in a misaligned state. FIG. 5 is a partial cross-sectional view of the female connecting member and the male connecting member connected from the state shown in FIG. 4 . FIG. 11 is a partial cross-sectional view of one half of an example of a male connecting member used in Example 4 of the present invention. FIG. 11 is a partial cross-sectional view of another example of a male connecting member used in the fourth embodiment of the present invention, with half of the male connecting member being cross-sectional. FIG. 13 is a partial cross-sectional view of one half of an example of a male connecting member used in Example 5 of the present invention. FIG. 13 is a cross-sectional view showing another example of a male connecting member used in the fifth embodiment of the present invention. FIG. 13 is a cross-sectional view showing another example of a male connecting member used in the fifth embodiment of the present invention. FIG. 13 is a partial cross-sectional view of one half of an example of a male connecting member used in Example 6 of the present invention. FIG. 23 is a cross-sectional view showing another example of a male connecting member used in the sixth embodiment of the present invention. FIG. 23 is a cross-sectional view showing another example of a male connecting member used in the sixth embodiment of the present invention. FIG. 13 is a partial cross-sectional view of one half of an example of a male connecting member used in Example 7 of the present invention. FIG. 13 is a partial cross-sectional view of one half of an example of a male connecting member used in Example 8 of the present invention. FIG. 2 is a partial cross-sectional side view of a conventional male connecting member and a female connecting member.

The embodiment of the present invention will be described based on the examples shown in the figures.

[Example 1]
1 to 5 show a first embodiment of the present invention.

Figure 1 shows a concrete member connecting device 10 according to a first embodiment of the present invention, which has a female connecting member 1 and a male connecting member 2. Figure 2 shows a partial cross-sectional view of half of the female connecting member 1, and Figure 3 shows a partial cross-sectional view of half of the male connecting member 2. In the following, the left side of the female connecting member 1 in Figure 2 will be referred to as the front part A, the right side as the rear side B, and the right side of the male connecting member 2 in Figure 3 will be referred to as the front part C, and the left side as the rear side D.

The female connecting member 1 has a casing 3, which is formed in a tubular, for example cylindrical, shape, with a storage chamber 4 formed inside. The front part A of the storage chamber 4 is formed into a conical tapered hole 5 whose inner circumferential surface is a tapered surface whose inner diameter gradually increases from the front part A (the tip part 4a side) to the rear part (rear side) B, and the middle part of the storage chamber 4 is formed into a biasing means storage part 6. A female thread 3a is engraved on the inner circumferential surface of the rear part of the casing 3.

A cylindrical insertion section 7 is formed at the front of the storage chamber 4.

In the tapered hole 5, multiple sliding guide ridges (not shown) are formed along the axis X-X direction and split in the circumferential direction. In addition, in the tapered hole 5, multiple wedge-shaped female locking members 12 split in the circumferential direction are arranged between the sliding guide ridges so that they can slide in the axis X-X direction of the casing 3. In this embodiment, the number of female locking members 12 is three, but can be set arbitrarily. In the following, the female locking members 12 are also referred to as wedge nuts 12. It is not necessary to provide sliding guide ridges.

The number of wedge nuts 12 is three in this embodiment, but it may be one or more and can be set arbitrarily. In addition, adjacent wedge nuts 12 may be partially joined together to form an integral unit, and the wedge nuts 12 may be moved forward and backward in a state where the wedge nuts 12 are partially joined together, so that the locking hole 12c described below is reduced in diameter when the wedge nuts 12 are moved toward the front A side, and the locking hole 12c is expanded in diameter when the wedge nuts 12 are moved toward the rear B side. In addition, when manufacturing the female connecting member 1, adjacent wedge nuts 12 may be partially joined together to form an integral unit, and the wedge nuts 12 may be separated into multiple pieces when a male locking member 23 described below is inserted into the locking hole 12c.

The outer surface of the wedge-shaped female locking member 12 is formed into a tapered surface 12a that follows the tapered surface of the tapered hole 5, that is, the outer diameter gradually expands from the front A (tip 4a) side to the back B side. Furthermore, on the inner peripheral surface of each female locking member 12, a locking portion (female thread) 12b consisting of a helical locking ridge and locking groove is engraved in an arc centered on the axis X-X of the casing 3 and in a direction along the axis X-X. As long as this helical locking portion 12b is formed in a helical shape, any shape of thread can be used as the cross-sectional shape, and locking portions (female threads) 12b consisting of a saw-tooth-shaped locking ridge and locking groove with an axial cross-section in the shape of a scalene triangle and a small taper angle at the tip, as well as locking portions (female threads) 12b in the shape of an isosceles triangle, right-angled triangle, etc. can be used.

As a result of the above, a locking hole (internal thread hole) 12c is formed by the multiple wedge nuts 12, and as each wedge nut 12 retreats along the tapered surface, the internal thread hole 12c is enlarged in diameter, and as each wedge nut 12 moves toward the forward end A, the internal thread hole 12c is reduced in diameter.

A biasing means receiver (spring receiver) 13 that commonly engages with each wedge nut 12 is disposed at the rear end of the wedge nut 12. The number of biasing means receivers 13 may be one or more.

A lid 14 with a screw hole 14a formed in the center is screwed onto the female thread 3a at the rear side B of the casing 3.

The biasing means 15 is provided between the biasing means receiver 13 and the lid 14. The biasing means 15 is made of an elastic material such as a coil spring, rubber, resin, or urethane. In this embodiment 1, a coil spring is used and the wedge nuts 12 are stored in a compressed state. Due to the biasing force of the biasing means 15, each wedge nut 12 is constantly biased toward the tip 4a (front A).

An anchor bar 18 that protrudes from the lid 14 toward the rear side B is screwed and fixed to the lid 14. A retaining portion 18a is provided on the rear side B of the anchor bar 18 and protrudes toward the outer periphery.

As shown in FIG. 1, the female connecting member 1 is embedded and fixed in one of the shield segments 19, which is one of the concrete members, so that the surface 3c on the tip end 4a side of the casing 3 is flush with the joint surface 19a of the shield segment 19.

Next, we will explain the male connecting member 2.

The male connecting member 2 has a first adjustment member 21 made of a deformable material, for example, an elastic material such as polystyrene foam or rubber, resin, or cardboard. The first adjustment member 21 is formed into a cylindrical shape with circular inner and outer circumferential surfaces, and a connecting body 22 having a circular outer surface is provided within this first adjustment member 21. In other words, the first adjustment member 21 is provided on the outside in the radial direction of the connecting body 22 centered on the axis Y-Y of the male connecting member 2. The outer circumferential surface shape of the first adjustment member 21 and the connecting body 22 can be formed into any shape other than a circle, such as a hexagon.

The connector 22 is made of metal and has a hollow section 22a that is open at both axial ends (front end C and rear end D). A female thread 22b is engraved on the inner wall of the hollow section 22a from the front end C to the rear end D, and a cylindrical section 22c that is formed into an unthreaded cylinder is formed between the tip of the female thread 22b and the tip of the connector 22.

As shown in FIG. 3, the tip C of the female thread 22b of the connector 22 is screwed into the male thread 23a engraved on the rear side of the male locking member 23.

The male locking member 23 protrudes from the tip of the connector 22, and at its tip (front side) C, a dome-shaped guide section 24 is formed, the diameter of which decreases at the tip C. That is, a curved surface is formed at the tip to guide the female locking member 12, and at the back side D, and further ahead than the male thread 23a, a locking section (male thread) 23b consisting of a helical locking ridge and locking groove is engraved.

The locking portion 23b is helical and can have any shape that corresponds to the locking portion 12b of the wedge nut 12. For example, a locking portion (male thread) 23b consisting of a sawtooth-shaped locking ridge and locking groove with a scalene triangular axial cross section and a small taper angle at the tip, an isosceles triangle, a right triangle, or other shape can be used. The diameter of the locking portion 23b is set to be slightly larger than the diameter of the screw hole 12c formed by the wedge nuts 12 when they are fully advanced.

A base 25 is formed between the locking portion (male thread) 23b and the male thread 23a, and as shown in Figure 3, the base 25 is composed of an unthreaded cylinder of approximately the same diameter in the axial direction Y-Y.

The outer diameter of the base 25 is larger than the outer diameter of the male thread 23a and the locking portion 23b, and the innermost portion of the base 25 fits into the cylindrical portion 22c of the hollow portion 22a. The outer diameter of the base 25 is smaller than the inner diameter of the insertion portion 7 of the female connecting member 1.

As shown in FIG. 3, an anchor bar 30 is fixed to the rear side D of the connector 22 by screwing. A brim-shaped retaining portion 30a is provided at the rear side D end of the anchor bar 30. A space-retaining pipe 31 made of an elastic material such as rubber or metal is provided on the outer periphery of the anchor bar 30. The front end of the space-retaining pipe 31 is engaged with the retaining portion 21a at the rear side D of the first adjustment member 21, and the rear side D end is engaged with a seat member 32 made of an elastic material such as rubber provided on the retaining portion 30a of the anchor bar 30. A gap 33 is provided between the anchor bar 30 and the space-retaining pipe 31.

In addition, without providing the gap maintaining pipe 31 and the gap 33, the entire outer circumference of the part of the anchor bar 30 that corresponds to the gap maintaining pipe 31 may be formed from an elastic material such as rubber, and for example, the first adjustment member 21 may be formed to extend to the back side.

As shown in Figures 4 and 5, the first adjustment member 21, the anchor bar 30, and the gap retaining pipe 31 are embedded and fixed in the other shield segment 35, which is the other concrete member, so that the front end surface 22d of the connector 22 is flush with the joint surface 35a of the shield segment 35, and concrete is poured outside the first adjustment member 21, the gap retaining pipe 31, and the retaining portion 30a.

In addition, a sealing material (not shown) is provided protruding from the joint surface 19a of one shield segment 19, and a sealing material (not shown) is provided protruding from the joint surface 35a of the other shield segment 35.

The male connecting member 2 provided on the other concrete member 35 is capable of displacement in a direction perpendicular to the axis Y-Y, centered on the anti-slip portion 30a of the anchor bar 30, due to the interaction between the first adjustment member 21 made of a deformable member, the gap 33, the gap retaining pipe 31, and the seat member 32.

The distance (thread pitch) between the female thread 12b of the wedge nut 12 and the male thread 23b of the male locking member 23 is set arbitrarily, and in this embodiment, it is set smaller than the thread pitch for the nominal diameter of the fine thread specified in JIS.

Next, we will explain the connection method of the concrete member connection device 10 of the present invention.

First, with the axis X-X of the female connecting member 1 and the axis Y-Y of the male locking member 23 of the male connecting member 2 positioned approximately coaxially, one shield segment 19 and the other shield segment 35 are brought relatively close to each other, and the male locking member 23 is inserted through the opening of the insertion portion 7 of the female connecting member 1.

When the male locking member 23 is inserted from the insertion portion 7 of the female connecting member 1, the male locking member 23 pushes back each wedge nut 12 against the biasing force of the biasing means 15, expanding the diameter of the screw hole 12c formed by each wedge nut 12, and advances while climbing over the locking ridges of each wedge nut 12.

When the tip surface of the casing 3 in the female connecting member 1, i.e., the joint surface 19a of one shield segment 19, comes into contact with the tip surface of the connector 22 in the male connecting member 2, i.e., the joint surface 35a of the other shield segment 35, and the insertion of the male connecting member 2 is stopped, each wedge nut 12 is pushed back toward the tip 4a by the biasing force of the biasing means 15, and the diameter of the threaded hole 12c formed in each wedge nut 12 is reduced by the tapered surface of the tapered hole 5, and the female thread 12b of each wedge nut 12 engages with the male thread 23b of the male locking member 23.

The female connecting member 1 and male connecting member 2 of this embodiment 1 have the above-mentioned structure, and therefore provide the following actions and effects.

Even if the axis X-X of the female connecting member 1 and the axis Y-Y of the male connecting member 2 are not concentric (misaligned) as shown in Figure 4, the male connecting member 2 can displace the axis of the male locking member 23 in a direction perpendicular to the axis Y-Y of the male connecting member 2, as shown in Figure 5, around the retaining portion 30a of the anchor bar 30, due to the interaction between the first adjustment member 21, which is made of a deformable material, the gap 33, the gap retaining pipe 31, and the seat member 32, and the male locking member 23 can be inserted into the screw hole 12c of the female connecting member 1.

In addition, as shown in FIG. 5, when the female connecting member 1 and the male connecting member 2 are connected with the axis Y-Y of the male connecting member 2 tilted relative to the axis X-X of the female connecting member 1, after the base 25 of the male locking member 23 abuts against the insertion portion 7, the axis of the male locking member 23 is guided in the direction of the axis X-X of the female connecting member 1, preventing the positions of one wedge nut 12 and another wedge nut 12 from differing significantly in the axial direction.

As a result, even if a large external force acts between the shield segments 19, 35 in a direction separating them after connection, the mesh size between the shield segments 19, 35 can be minimized, preventing water leakage from between the shield segments 19, 35. In addition, because the mesh size can be reduced, the amount of sealing material provided between the shield segments 19, 35 can be reduced, reducing manufacturing costs.

Furthermore, by setting the outer diameter so as to provide the necessary strength for base 25, where the shear load applied to male connecting member 2 is strongest when shield segments 19, 35 are connected, and making the outer diameter of male thread 23a and locking portion 23b of male locking member 23 thinner than base 25, the outer diameter of the entire male connecting member 2 can be formed thin, and even if the outer diameter of the entire male connecting member 2 is thus thinned, the strength required of male connecting member 2 can be ensured. Furthermore, by forming the outer diameter of the entire male connecting member 2 thin, the manufacturing cost of male connecting member 2 can be reduced.

[Example 2]
In the above-mentioned first embodiment, the locking portion 23b of the male locking member 23 and the locking portion 12b of the female locking member 12 are formed with spiral locking ridges and locking grooves, but the locking portion 23b of the male locking member 23 and the locking portion 12b of the female locking member 12 may be formed with a plurality of locking ridges and locking grooves formed in a ring shape perpendicular to the axes X-X and Y-Y and arranged continuously in the axial direction.

The locking ridges and locking grooves of the locking portion 23b of the male locking member 23 and the locking portion 12b of the female locking member 12 can be formed as desired. For example, a locking portion consisting of a series of locking ridges in the shape of an isosceles triangle, or a locking portion consisting of a series of locking ridges in the shape of a right triangle or a scalene triangle with a small taper angle at the tip can be used.

The distance (pitch) between the locking threads is set to a value equivalent to the thread pitch shown in Example 1 above.

The other components have the same structure as in Example 1 above, so their description will be omitted.

In addition, this embodiment 2 also provides the same effects and advantages as the embodiment 1.

[Example 3]
In the above-mentioned first and second embodiments, the male connecting member 2 is provided with the first adjustment member 21, anchor bar 30, gap retaining pipe 31, etc., so that the male locking member 23 can be displaced in a direction perpendicular to the axis Y-Y of the male connecting member 2. However, the female connecting member 1 may also be provided with members that have the same effect as the first adjustment member 21, anchor bar 30, gap retaining pipe 31, etc., of the male connecting member 2, so that the female connecting member 1 can be displaced in a direction perpendicular to its axis X-X, centered on the anti-slip portion of the anchor bar.

The other components have the same structure as in Examples 1 and 2 above, so their description will be omitted.

In addition, this embodiment 3 also provides the same effects and advantages as the embodiments 1 and 2.

[Example 4]
The present embodiment 4 shown in Figure 6 is provided with a connector movement suppression member 40 formed of metal on the radial outside of the axis Y-Y of the male connecting member 2 in the first adjustment member 21 of the above embodiments 1 to 3, and which suppresses the radial movement of the male connecting member 2 in the connector 22 around the axis Y-Y.

The connector movement suppression member 40 is positioned so that its tip surface is substantially flush with the joint surface 35a of the other shield segment 35.

In addition, the connecting body movement suppression member 40 may be formed so as to cover the entire circumference of the tip C of the first adjustment member 21, as shown in Figure 6, or may be formed so as to cover the entire outer peripheral surface of the first adjustment member 21, as shown in Figure 7.

The other components have the same structure as in Examples 1 to 3 above, so their description will be omitted.

In addition, this embodiment 4 also provides the same effects and advantages as the embodiments 1 to 3.

Furthermore, in this embodiment 4, a connector movement suppression member 40 is provided that suppresses radial movement of the male connecting member 2 in the connector 22 around the axis Y-Y. As shown in FIG. 5, when the male connecting member 2 is connected to the female connecting member 1 and the axis Y-Y of the male connecting member 2 is inclined with respect to the axis X-X of the female connecting member 1, the radial movement of the male connecting member 2 around the axis Y-Y is suppressed, the load applied to the shield segment 35 is reduced, and the occurrence of cracks in the shield segment 35 can be suppressed.

[Example 5]
In the male connecting member 2 of Examples 1 to 4 above, the rear side portion of the base 25 was fitted into the cylindrical portion 22c of the hollow portion 22a of the connecting body 22. However, in the male connecting member 46 of this Example 5, as shown in Figure 8, the base 25 is not fitted into the connecting body 42, but is positioned so as to be located on the tip C side of the connecting body 42, and the rear side B portion 41a of the base 41 is positioned on the rear side B of the joint surface 35a of the other shield segment 35.

The hollow portion 42a of the connector 42 is formed so that both ends in the axial direction (front end C and rear end D) are open, and a female thread 42b is engraved on the inner wall of the hollow portion 42a from the front end to the rear end, and the unthreaded cylindrical portion 22c of the above-mentioned Example 1 is not formed.

A brim-shaped base movement suppression member 44 made of metal and having a hole 44a formed in the center is provided on the radial outside of the axis Y-Y of the male connecting member 2 in the connecting body 42 of the rear side 41a of the base 41, and a space 45 is formed between the rear side 41a of the base 41 and the inner surface of the hole 44a in the base movement suppression member 44. In addition, the tip surface 44b of the base movement suppression member 44 is formed so as to be located on approximately the same plane as the joint surface 35a of the other shield segment 35.

The outer peripheral surface 44c of the base movement suppression member 44 may be formed so as to be perpendicular to the tip surface 44b as shown in Fig. 8, or the outer end of the rear end surface 44d in the radial direction centered on the axis Y-Y of the male connecting member 2 may be formed so as to be positioned outside the outer end of the rear end surface 44b in the radial direction centered on the axis Y-Y of the male connecting member 2. For example, as shown in Fig. 9, it may be formed in a tapered shape that is positioned more outward as it approaches the rear side, or as shown in Fig. 10, a step 47 may be formed so that the outer end of the rear end surface 44d is positioned outside the outer end of the tip surface 44b.

The other components have the same structure as in Examples 1 to 4 above, so their description will be omitted.

In addition, this embodiment 5 also provides the same effects and advantages as the embodiments 1 to 4.

Furthermore, in the male connecting member 46 of this Example 5, the base 41 is not engaged with the connecting body 42, but is positioned so as to be located at the tip side of the connecting body 42, and the rear portion 41a of the base 41 is positioned further rear than the joint surface 35a of the other shield segment 35. As a result, the outer diameter of the connecting body 42 of the male connecting member 46 can be made thinner than the outer diameter of the connecting body 22 of the male connecting member 2 of Examples 1 to 4 above, and the outermost diameter of the male connecting member 46 can be made thinner than the outermost diameter of the male connecting member 2, thereby reducing the manufacturing cost of the male connecting member 46.

When the radially outer end of the male connecting member 2 at the rear end face 44d, which is centered on the axis Y-Y, is formed to be located outside the radially outer end of the male connecting member 2 at the tip face 44b, which is centered on the axis Y-Y, the base movement suppression member 44 can be prevented from falling off the other shield segment 35.

[Example 6]
In this embodiment 6, a second adjustment member 50 formed from a deformable member, for example, an elastic material such as polystyrene foam or rubber, resin, cardboard, etc., is provided on the radial outside of the axis Y-Y of the male connecting member 2 in the base movement suppression member 44 of the above-mentioned embodiment 5.

The shape of the second adjustment member 50 can be formed as desired, depending on the shape of the outer peripheral surface 44c of the base movement suppression member 44, as shown in Figures 11 to 13.

The other components have the same structure as in Example 5 above, so their description will be omitted.

In addition, this embodiment 6 also provides the same effects and advantages as the above-mentioned embodiment 5.

Furthermore, by providing a second adjustment member 50 on the radial outside of the base movement suppression member 44, the female connecting member 1 and the male connecting member 2, 46 can be connected satisfactorily even if the misalignment between the axis X-X of the female connecting member 1 and the axis Y-Y of the male connecting member 2, 46 is large.

[Example 7]
In this embodiment 7, a connector movement inhibiting member 60 is provided on the radial outside of the axis Y-Y of the male connecting member 2 in the first adjustment member 21 of the above embodiment 5, and the male connecting member 2 inhibits radial movement of the male connecting member 2 in the connector 42 around the axis Y-Y, and the connector movement inhibiting member 60 is integrally formed with a base movement inhibiting member 44 similar to the base movement inhibiting member 44 of the above embodiment 5.

The other components have the same structure as in Example 5 above, so their description will be omitted.

In addition, this embodiment 7 also provides the same effects and advantages as the embodiment 5.

[Example 8]
In the present embodiment 8 shown in Figure 15, a second adjustment member 70 formed of a deformable member, such as an elastic material such as polystyrene foam, rubber, resin, cardboard, etc., is formed radially outward from the axis Y-Y of the male connecting member 2 in the connecting body movement inhibiting member 60 and the base movement inhibiting member 44 of the above-mentioned embodiment 7, so as to cover the entire outer peripheral surfaces of the connecting body movement inhibiting member 60 and the base movement inhibiting member 44.

The other components have the same structure as in Example 7 above, so their description will be omitted.

In addition, this embodiment 8 also provides the same effects and advantages as the embodiment 7.

Furthermore, in this embodiment 8, a second adjustment member 70 is provided on the radial outside of the connector movement suppression member 60 and the base movement suppression member 44, centered on the axial center Y-Y of the male connecting member 2, so that the female connecting member 1 and the male connecting members 2, 46 can be connected well even if the misalignment between the axial center X-X of the female connecting member 1 and the axial center Y-Y of the male connecting members 2, 46 is large.

Specific examples of the present invention have been described in detail above, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and variations of the specific examples given above.

REFERENCE SIGNS LIST 1 Female connecting member 2, 46 Male connecting member 3 Casing 4 Storage chamber 5 Tapered hole 10 Concrete member connecting device 12 Female locking member 12b Locking portion of female locking member 12c Locking hole 15 Pressing means 19, 35 Shield segment (concrete member)
Reference Signs List 21 First adjustment member 22, 42 Connector 22a Hollow portion 22b Male thread 22c Cylindrical portion 23 Male locking member 23b Locking portion of male locking member 25 Base 40, 60 Connector movement suppressing member 44 Base movement suppressing member 45 Space 50, 70 Second adjustment member

Claims (8)

A female connector and a male connector are provided.
A storage chamber having an open tip is provided in the female connecting member, and a female locking member having a locking portion formed of a continuous locking ridge on an inner surface side is provided in the storage chamber,
a male locking member having a locking portion formed of a continuous locking ridge at a tip of the male connecting member;
A locking hole is formed on the inner side of the female locking member,
By inserting the male locking member into the locking hole, the locking hole expands in diameter and then contracts in diameter, so that the locking portion of the female locking member and the locking portion of the male locking member engage with each other,
The female connecting member is fixed to one concrete member, and the male connecting member is fixed to the other concrete member,
The male connecting member has a connecting body having a hollow portion with an opening at a tip, and a female screw is formed on the inner wall of the hollow portion of the connecting body,
A base is provided on the inner side of the locking portion, and a male screw is formed on the inner side of the base to screw into the female screw of the connector,
The outer diameter of the base is larger than the outer diameters of the locking portion and the male screw,
The outer diameter of the locking portion side end of the base is made thinner toward the locking portion side, and the outer diameter of the male thread side end of the base is made thinner toward the locking portion side,
A gap is formed between the outer surface of the base and a member positioned outside the base,
The rear side of the base is located rearward of the one concrete member side surface of the other concrete member,
A connecting device for concrete members, characterized in that a first adjustment member made of a deformable material is provided on the outer periphery of the connecting body. A tapered hole having a tapered surface whose diameter decreases toward the front is formed in the storage chamber, a wedge-shaped female locking member divided in the circumferential direction is disposed in the tapered hole so as to be slidable in the axial direction, and a locking portion consisting of a plurality of locking ridges is engraved on the inner surface of the female locking member, and the female locking member is biased forward by a biasing means,
2. A concrete member connecting device as described in claim 1, characterized in that the male locking member is inserted into a locking hole formed by the female locking member, causing the locking hole to expand in diameter, and then the locking hole is narrowed in diameter by a biasing means so that the locking portion of the female locking member and the locking portion of the male locking member engage with each other. The tip end of the connector is positioned on the rear side of the other concrete member relative to the side surface of the one concrete member,
The base portion is provided on the tip side of the tip end of the connector,
3. The connecting device for concrete members according to claim 1, further comprising a space formed around a rear side portion of said base. The connecting device for concrete members according to any one of claims 1 to 3, characterized in that a connector movement suppressing member is provided on the radial outside of the axis of the male locking member of the first adjustment member, the connector movement suppressing member being made of metal and suppressing radial movement of the male locking member of the connector around the axis of the male locking member. The connecting device for concrete members according to claim 4, characterized in that a second adjustment member made of a deformable member is provided radially outward from the axis of the male locking member in the connector movement suppression member. a base movement suppressing member formed of metal and provided on the radial outside of the male locking member at the back side of the base, the base movement suppressing member suppressing radial movement of the male locking member at the base, the base movement suppressing member being provided on the radial outside of the male locking member at the back side of the base, the base movement suppressing member being provided on the radial outside of the male locking member at the base;
The space is formed between the base movement suppressing member and the base,
4. The connecting device for concrete members according to claim 3, wherein the base movement suppressing member is embedded in the other concrete member. The concrete member connecting device according to claim 6, characterized in that a second adjustment member made of a deformable material is provided radially outward from the axis of the male locking member of the base movement suppression member. a first adjustment member formed of a deformable member on the outer periphery of the connecting body, and a connecting body movement suppression member formed of metal on the outer side in a radial direction around the axis of the male locking member of the first adjustment member and suppressing movement of the connecting body in a radial direction around the axis of the male locking member,
8. The connecting device for concrete members according to claim 6 or 7, characterized in that the connector movement suppressing member and the base movement suppressing member are integrally formed.

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